Magnetospheric magnetic reconnection in high-mass young stellar objects and its possible relation to methanol maser flares
文献类型：期刊论文
| 作者 | Khaibrakhmanov, Sergey A.4,5; Sobolev, Andrey M.1,5; Chen, Xi2,3 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2025-07-09 |
| 卷号 | 699页码:L7 |
| 关键词 | accretion, accretion disks magnetic reconnection masers stars: massive stars: protostars ISM: magnetic fields |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202554974 |
| 产权排序 | 3 |
| 英文摘要 | Context. Maser emission is an inherent property of regions of high-mass star formation. Often the masers exhibit flares with duration times from several hours to tens of years. The nature of long-time flares can be explained by the model of episodic accretion. The origin of short-time flares is still uncertain. Aims. Our goal is to elaborate on the physics of short-time maser flares in the region of high-mass star formation G33.641-0.228. Methods. Based on an analysis of the observational data and predictions of the star formation theory, we hypothesise that the young star in G33.641-0.228 has a magnetosphere and is surrounded by the circumstellar disc threaded by a large-scale magnetic field. We use the equations of the standard accretion disc theory to analyse the interaction of the accretion flow with the magnetosphere. We propose that the boundary of the magnetosphere is a current sheet and analyse possible magnetic reconnection speeds, as well as estimate the corresponding amount and timescales of magnetic energy release. Results. Our estimates show that the magnetospheric current sheet can exist in two states. In a quiescent state, the magnetic reconnection is slow, and the magnetic energy release is small. In a burst state, interchange and other magneto-hydrodynamic (MHD) instabilities cause turbulence generation in the flow. The magnetic reconnection switches to a fast regime driven by turbulence, and the energy release becomes significant compared to the luminosity of a protostar. The time of fast magnetic reconnection is less than or similar to 1 day, which is comparable to observed rise times of maser flares in G33.641-0.228. Conclusions. Magnetic reconnection of stellar and disc magnetic fields near the magnetosphere can be a mechanism for short-time maser flares in G33.641-0.228 and similar objects. This process can be accompanied by X-ray flares; therefore, coordinated high-angular and high-time observations of maser flares, IR, and X-ray emission represent a promising new way of studying high-mass star formation. |
| WOS关键词 | QUASI-PERIODIC PULSATIONS ; ACCRETION DISKS ; BURSTING ACTIVITY ; STAR-FORMATION ; VARIABILITY ; EVOLUTION ; EMISSION ; FIELDS ; OSCILLATIONS ; TURBULENCE |
| 资助项目 | Russian Science Foundationhttps://doi.org/10.13039/501100006769 ; AMS on the MHD scenario of maser flares (Sect.)[23-12-00258] ; Russian Science Foundation[FEUZ-2025-0003] ; Ministry of Science and Education of Russia |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001525746000002 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | Russian Science Foundationhttps://doi.org/10.13039/501100006769 ; AMS on the MHD scenario of maser flares (Sect.) ; Russian Science Foundation ; Ministry of Science and Education of Russia |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7913]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Khaibrakhmanov, Sergey A. |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 4.St Petersburg State Univ, Math & Mech Fac, St Petersburg 198504, Russia 5.Ural Fed Univ, Ekaterinburg 620000, Russia |
| 推荐引用方式 GB/T 7714 | Khaibrakhmanov, Sergey A.,Sobolev, Andrey M.,Chen, Xi. Magnetospheric magnetic reconnection in high-mass young stellar objects and its possible relation to methanol maser flares[J]. ASTRONOMY & ASTROPHYSICS,2025,699:L7. |
| APA | Khaibrakhmanov, Sergey A.,Sobolev, Andrey M.,&Chen, Xi.(2025).Magnetospheric magnetic reconnection in high-mass young stellar objects and its possible relation to methanol maser flares.ASTRONOMY & ASTROPHYSICS,699,L7. |
| MLA | Khaibrakhmanov, Sergey A.,et al."Magnetospheric magnetic reconnection in high-mass young stellar objects and its possible relation to methanol maser flares".ASTRONOMY & ASTROPHYSICS 699(2025):L7. |
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来源：新疆天文台
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